ISSN:
0098-1273
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Zero-shear-rate intrinsic viscosities [η]0 in benzene at 25°C and in cyclohexane at 34.5°C were measured for two series of polystyrene samples: six fractions ranging in Mw(weight-average molecular weight) from 8.8 × 106 to 5.7 × 107 and 11 “monodisperse” samples ranging in Mw from 4 × 103 to 4.8 × 106. The results, combined with typical literature data, yielded \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {[\eta ]_0 = 7.8 \times 10^{ - 5} \bar M_w^{0.75 \pm 0.01} } & {(4 \times 10^5 〈 \bar M_w 〈 6 \times 10^7 ,{\rm benzene at }25^\circ {\rm C})} \\ {[\eta ]_0 = 8.8 \times 10^{ - 4} \bar M_w^{0.50} } & {(10^3 〈 \bar M_w 〈 6 \times 10^7 ,{\rm cyclohexane at }34.5^\circ {\rm C})} \\ \end{array} $$\end{document} These relations cover the broadest range of molecular weights reported so far in the literature on synthetic polymers. In contrast to Slagowski et al., we observe no “anomaly” in the molecular weight dependence of [η]0 for benzene solutions of very high molecular weight samples (〉107).
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1979.180171205
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